Investor Presentaiton

Strong Financial Performance Operating Net Income and Operating Diluted Earnings Per Share Dollars in millions $50 In dollars $20.00 $45 5-Year EPS CAGR (through 2020) +11.9% $40 $43.9 I | I I $15.00 I I $35 $29.2 $30 I I I $10.00 I $25 $24.0 I $20 $18.7 $6.90 $15 $6.20 $13.5 $5.00 $5.80 I $4.56 $10 $1.92 $5 $0.00 2017 2018 Operating Net Income (left axis) 2019 2020 2021 YTD Operating Diluted Earnings Per Share (right axis) CAMBRIDGE BANCORP 7 Operating Net Income and Operating Diluted EPS are adjusted to exclude merger related, and other non operating expenses in 2018, 2019, and 2020 as well as a tax charge in 2017.

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